Waterproofing process for textile fabrics, paper, and such materials



Dec. 4,1923. 1,476,226

. R. A. GRlMOlN-SANSON WATERPROOFING PROCESS FOR TEXTILE FABRICS, PAPER,AND SUCH MATERIALS Filed Nov. 26 1921 ATTORNEY Patented Dec. 4, 1923..

UNITED STATES PATENT OFFICE.

BAOUL ADRIEN GRIHOIN-SANSON, OF OISSEL, FRANCE.

WATERPROOFING PROCESS FOR TEXTILE FABRICS, PAPER, AND SUCH MATERIALS.

Application filed November 26, 1921.

To all whom it may concern:

Be it known that I, RAoUL AnRreN GRI- MOIN-SANSON, citizen of theRepublic of France, and resident of Oissel, France (postoflice addressChateau dOissel), have invented a new and useful Waterproofing Processfor Textile Fabrics, Paper, and Such Materials, which improvements arefully set forth in the following specification.

Textile fabric waterproofing processes are already known according towhich the rubbered surface to be waterproofed is sprinkled with cork.But the cork penetrates only slightly into the india-rubber, the resultbe ing that the coating, while resistant at the surface frequentlybecomes spoilt or altered inside. 1

Attempts have been made to remedy this drawback by applying severalsuccessive layers or coatings of cork, but it has been found that, afterthe first application of cork, the cork coating or layer cannot becoated with rubber.

The object of my invention is to provide a waterproofing process,consisting in coating textile fabrics, paper, and such materials, with anumber of indie-rubber layers success'ivel covered over with a layer orcoating of pow cred wrk, the result being to make the fabric or othermaterial absolutely hot-washable and hot ironable, just like ordinarylinen.

To the aforesaid advantages are added great strength, extreme lightnessand small cost.

My invention is essentially characterized by a special treatment for andof the cork powder to be sprinkled over the rubber layers or coatings.

The cork owder collected in bottle-cork factories is amp and sticky.

According to the process which is the object of my invention and inorder to free the said powder from impurities which make it unsuitablefor coating it is soaked for about 24; hours in the ollowing mixturewhich should previously have been subjected to a careful and thoroughmixing:

Water 100 grams.

Carbonate of soda 5 grams. a

(It should be understood, of course, that theabove proportions are givenonly as an example).

Ar having allowed the powder'to soak for 24 hours, it has to becompletely dried by i a giilied layer of cork;

Serial No. 517,926.

aerating it with air heated up to (say) degrees centigrade.

fter complete drying, an operation which requires about two hours, thesaid powder is screened and is then ready for use.

This powder will take as many rubber coatings or layers as desired if,in front of the spreading knife, a roller saturated with benzene isarranged and the following method is practiced: 7

After having put on one or two rubber layers or coatings, according tothe fabric to be treated, the cork is applied simply by causing thefabric to pass, when leaving the knife, beneath a hopper mounted on thework-table (about one meter fifty centimeters from the knife) andcontainin powdered cork prepared as above state As the fabric passesbeyond the hopper the cork is pressed into the rubber by a pair ofcoacting rolls.

The other coatings are put on as usual, subject to a felt rollersaturatedwith benzene being placed in front of the spreading knife, suchroller priming the cork and cansing it to adhere tightly to the rubber.

' inally the fabric is thoroughly calenderedi One form of apparatus forcarrying out the described process is represented in the annexed drawingin diagrammatic side elevation, with parts in section. The componentelements of this apparatus are as follows:

A is the roll for receiving the fabric after a single layer of rubberand cork has been aplied thereto;

the felt roller saturated with benzene for treating the fabric so that afresh coatof rubber will adhere to the previouslythe tank containing thebenzene which discharges slowly therefrom upon the felt roller B;

D, alarge hard-rubber roller where the rubber, indicated at E, isapplied and impregnates the fabric which is stretched mechanical? andpasses beneath the spreading knife The latter regulates the applicationof the rubber, so that the cork which is contained in the hopper I willadhere to this layer or coating of rubber.

On passing beyond the hopper, the fabriccoated with the powdered corktravels for a distance of about alongithe-twork table J and reaches thesmall pressure rolls K which cause the cork to penetrate the still softand fresh layer so as to form with .in hot water and ironed with a hotiron without undergoing any change; and the cork so treated can bereadily dyed, and is capable of receiving any desired impression orprinting.

For clothing, inter alia, impressions and colours can therefore beobtained suggestive of fashionable draperies, Scotch checks, etcObviously, the water-proofing process as I above set forth can just aswell be used for waterproofing paper, calico, or any other similarstuff, subject to the operation being conducted as above stated.

Having now particularly described and ascertained the nature of my saidinvention and the manner in which the same is to be performed, I declarethat what I claim is:

1. A process of producing waterproof ma.- terial, comprising soakingpowdered cork in an alkaline solution, drying the cork, applying acoating of rubber to a sheet of fibrous material, and then applying thedried cork powder to the coated surface of the sheet; substantially asdescribed.

2. A process of producing waterproof material, comprising soakingpowdered cork in a solution of sodium carbonate, drying the cork,applying a coating of rubber to a sheet of fibrous material, and thenapply ing the dried cork powder to the coated surface of the sheet;substantially as described.

3. A process of producing waterproof material, comprisin soakingpowdered cork in an alkaline solution, drying the cork, alternatelycoating a sheet of fibrous material with rubber and applying the driedcork .powder to the coated surface of the sheet,

and pressing the powdered cork into the rubher after the application ofeach layer of.

cork; substantially as described.

4. A process of producing waterproof material, comprising soakinpowdered cork in a solution of sodium car onate, drying the cork,alternately coating a sheet of fibrous material with rubber and applyingthe dried cork powder to the coated surface of the sheet, and pressingthe powdered cork into the rubber after the application of each layer ofcork; substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

RAOUL ADRIEN GRIMOIN-SANSON. Witnesses .FERNARD DUFOUR,

CHARLES LEON Loreen.

